//***********************************************************
// file: guess2.cpp
//    Author:   <fill in your name>
//    Create Date:     <fill in the date>
//    Last Modified:   <fill in the date>
//    Class:    CPSC 220, section <fill in the sec number>
//    Language: C++
//    Purpose:  Allows the user to guess a random number
//    Input:    (from standard input) random number seed and
//              a guess
//    Output:   (to standard output) the result of the guess
//    Pledged: 
// 
//***********************************************************

#include <iostream>
#include <cmath>

// prototype for function random. Returns a random integer with the
// range specified by the parameters
int random( int // lower value for range of  random number
	   , int // upper value for range of random number
	   );

int main ( void ) 
{

        // Constant declarations
	const int UPPER_LIMIT = 10; // maximum value that can be produced
				   //  by the random number generator 
	const int LOWER_LIMIT = 1;  // minimum value that can be produced
                                   //  by the random number generator

	// Local variable declarations
	int     number;  // the number to be guessed
	int     guess;   // the users guess
	int     seed;    // a seed for the random number generator

	// Get a seed for the pseudo-random number generator

	cout << "Let's play a guessing game." << endl;
	cout << "First, enter a number between 1 and 100 to act "
	     << "as a seed for the random number genreator:";
	cin >> seed;

	// Initialize the random number generator with the random seed
	
	srand(seed);

	// Generate a random number in the range [LOWER_LIMIT,UPPER_LIMIT]

	number = random(LOWER_LIMIT, UPPER_LIMIT);

	// Ask for a guess 

	cout << "OK, now guess a number between 1 and 10:";
	cin >> guess;

	// Tell the user whether the guess is right or wrong

	if (guess != number)
		cout << "Too bad. I was thinking of " 
		     << number << "." << endl;
	else 
		cout << "Congratuations! " << guess 
		     << " was correct!" << endl;

	return 0;

} // end main 


//********************************************************************
// function:  int random (const int lowerLimit, const int upperLimit )
//      Purpose: 	produces a pseudo-random number
//      Parameters:     integer representing the minimum possible 
//                        value of the number generated 
//                      integer representing the maximum possible 
//                        value of the number generated 
//      Postcondition:  returns a pseudo-random number
//********************************************************************  
int random ( int lowerLimit,   // min possible value of number generated
	     int upperLimit )  // max possible value of number generated
{
	int randomValue; // stores the random number generated

	randomValue = (rand( ) % upperLimit) + lowerLimit;

	return randomValue;

} // end function Random()